CHEIROPLATYS. 321 



1. Cheiroplatys cultripes. (Tab. XVIII. figg. 19 <j , 20 $ .) 



Orizabus cultripes, Fairm. Rev. et Mag. Zool. 1878, p. 261 \ 



Hab. Mexico, Orizaba \ Toluca, Tepansacualco, Duraznal (SalU), Jalapa, Misantla, 

 Mexico city (Edge); Guatemala, Coban in Vera Paz (Champion), Tactic, Tepan 

 (Conradt). 



This species is barely distinguished from the following by the immarginate base of 

 the thorax ; for some examples show a trace of marginal sulcus in the depression which 

 exists on each side, and it is often visible also towards the hind angles. 



The anterior tibiae of the female, both in this species and in C. clunalis, sometimes 

 assume the male form, i. e. the outer side laminiform and unarmed. In all the other 

 females the anterior tibiae are more or less expanded, and the outer edge is often deeply 

 bisinuated, or even unisinuated, rather than tridentated. 



2. Cheiroplatys clunalis. 



Aphonus (?) clunalis, Leconte, Proc. Ac. Phil. 1856, p. 23 \ 

 Orizabus Snowii, Horn, Trans. Am. Ent. Soc. 1885, p. 124 (^) 2 . 

 Orizabus ligyroides, Horn, loc. cit. p. 125 ( ? ) 3 . 

 Orizabus marginatus, Pairm. Eev. et Mag. Zool. 1878, p. 262 4 . 

 Orizabus Sallei, Pairm. loc. cit. 5 



Hab. Nokth America, Texas \ New Mexico 2 , Arizona 3 . — Mexico 4 , San Miguelito 

 (Dr. Palmer), Orizaba, Oaxaca, Jalapa 5 (Salle), Cordova, Pachuca in Hidalgo, Mexico 

 city (Edge). 



The marginal sulcus or impressed line of the base of the thorax is always visible in 

 both sexes, and, with a few exceptions (where it is interrupted and faint), continuous; 

 it is nearly always curved or angular in the middle of the basal lobe, and scored on 

 the dorsal surface (not on the deflected edge) of the thorax. 



I have compared type-specimens of the males of 0. marginatus and 0. sallcei, bearing 

 names in Fairmaire's handwriting, and find no differences between them, except in size 

 and punctuation, in both of which features, as well as in general form, the species is 

 very variable ; and I have also compared these with examples of C. clunalis (Lee), male 

 and female, named for me by Dr. Horn, and find no difference worth mentioning. 



3. Cheiroplatys fairmairei. (Tab. xviii. figg. 23 s , 24 $ .) 



Minor, breviter quadratus, pieeo-niger vel castaneus, thorace interdum rufo, nitidus, subtus vulpino-villosus ; 

 clypei margine antico cariniformi minime bidentato, fronte inermi vel unituberculata ; tborace antice 

 gradatim angnstato, medio basi late immarginato ; elytris fere sicut in O. clunali punctato-striatis. Tibiae 

 anticge c? 5 extus nnllo modo explanatae, obtuse tridentatae, dentibus duabus apicalibus approximatis. 

 <$ . Tborax sicut in $ convexus, simplex. 



Long. 16-19 millim. <? $ . 



Hab. Mexico, Jacale, San Andres Tuxtla (Salle), Pachuca in Hidalgo, Oaxaca,. 

 Esperanza (Edge). 

 biol. centr-amer., Coleopt., Vol. II. Pt. 2, December 1888. 2 TT 



